| Name | Hydrophyllum capitatum var. thompsonii (M. Peck) Constance |
| Authorship | (M. Peck) Constance |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Hydrophyllum capitatum Douglas |
| GUID | urn:lsid:ipni.org:names:125315-2 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hydrophyllum capitatum var. thompsonii (M. Peck) Constance |
| Identification made in | [no date] (1) |